Stem-winding attachment for watches



F. BLAUBR. Stem-Winding'Attaohment for Watches.

Patented Aug.1o,1sso

MFETERS. PHOTO-LITHDGHAPMER. wsmNGTDNy D C.

UNITED STATES PATENT OFFICE@ FREDRICK BLAUER, OF CHICAGO, ILLINOIS.

STEM-WINDING ATTACHMENT FORWATCHES.

SPECIFICATION forming part of Letters Patent No. 230,995, dated August10, 1880.

Application tiled February 16, 1380.

To all whom it may concern.:

Be it known that I, FREDRIGK BLAUER, of Chicago, in the county ot Cookand Sta-te ot Illinois, have invented a certain new and usefulImprovement in Stem Vinding Attachments for Watches, ot' which thefollowing is a specification.

The object I have in view is to produce a stem-wint'ling attachment i'orwatches which will be simple and strong and not liable to get out ot'order7 can bereadil;Y connected with or disconnected from the movement.and can be appliedto movements having either a male or t'emale couplingtor receiving the stem; and my invention therein consists in lthecombination ot the parts, as pointed out by the claim.

In the accompanying' drawings, forming a part hereot', Figure 1 is asection ot' a watchcase having my improved stem-wimling attachment,and'Fig. i? a separate elevation of the stem and crown.

The stem A ot' the watch is connected with thecrown B, which crown isot' the usual construction and covers the end ot' the pendant C. Thestem has a sliding movement in the pendant, which is limited by a screw,u, turned through the pendant above a collar, o, on the stem, preventingthe withdrawal ot' the stein from the pendant until said screw isloosened. 'Ihe stem projects into the case ot' the watch, where it isprovided with a squared end, c, or a socket to engage with a socket orstud in the movement for windii'igthe same. After the movement is pnt inthe case. the stem is pushed forward to couple with the same, and isdrawn backward when it is desired to remove the movement for anypurpose.

To hold the stem forwardin connection with the movement it is providedwith an annular groove, d, near its inner end, with which engages a pin,e, on either the back or front cover ot' the case. lVhen such coverisclosed the pin c passes through a hole, in the rim ot' the case, withwhich hole the groove d coincides when the stem is pushed in.

When the cover carrying the pin c is open the stem can be drawn back andthe movement taken out.

rIhe watch is wound up b v simpl)v turning the crown. to watches havingcases with seamless backs the pin c would be on the front cover.

The advantages arisingt'rom the simplicity, strength, and convenience.ot' in v device will be readilyY understood without t'urtherexplanation.

What I claim as my invention isln a stem-winding attachment t'orwatches, the sliding and revolving stem, held forward in connection withthey movement b v a pill on the cover, and adapted to be moved back andt'orth out oti and into connection with the movement when the, cover isopen, in combination with a screw in the pendant, which allows the` stemto be moved out ot' and into connection with the movement, but preventsits withdrawal from the pendant, substantialtiY as described and shown.

FRE DRIC K BLAUER.

Witnesses:

ItreHD. N. Dran, OLivER W. MARBLn.

It' this attachment were applied

